Hello everyone.Along with some of my collegefriends ive got an national assignment "Im to give out a questionnaire to teachers-gymnasts regarding cpr and generally first aid & accidents during school hours)"

The problem is that i dont know the population number.Its definately Finite but it maybe from 1000 to 10000 persons..Also should i use another type of sampling method-not random-. I want to be able to ``see`` in towns and villages if the rates differ significaly.

Thanks!